/**
   * @return breakpoints of one of the category: LINE_BREAKPOINTS, EXCEPTION_BREAKPOINTS,
   *     FIELD_BREAKPOINTS, METHOD_BREAKPOINTS
   */
  public <T extends Breakpoint> Breakpoint[] getBreakpoints(@NotNull final Key<T> category) {
    ApplicationManager.getApplication().assertIsDispatchThread();
    removeInvalidBreakpoints();

    final ArrayList<Breakpoint> breakpoints = new ArrayList<Breakpoint>();
    for (Breakpoint breakpoint : getBreakpoints()) {
      if (category.equals(breakpoint.getCategory())) {
        breakpoints.add(breakpoint);
      }
    }

    return breakpoints.toArray(new Breakpoint[breakpoints.size()]);
  }
 /** @param category breakpoint category, null if the category does not matter */
 @Nullable
 public <T extends BreakpointWithHighlighter> T findBreakpoint(
     final Document document, final int offset, @Nullable final Key<T> category) {
   for (final Breakpoint breakpoint : getBreakpoints()) {
     if (breakpoint instanceof BreakpointWithHighlighter
         && ((BreakpointWithHighlighter) breakpoint).isAt(document, offset)) {
       if (category == null || category.equals(breakpoint.getCategory())) {
         //noinspection CastConflictsWithInstanceof,unchecked
         return (T) breakpoint;
       }
     }
   }
   return null;
 }
  public void applyThreadFilter(
      @NotNull final DebugProcessImpl debugProcess, @Nullable ThreadReference newFilterThread) {
    final RequestManagerImpl requestManager = debugProcess.getRequestsManager();
    final ThreadReference oldFilterThread = requestManager.getFilterThread();
    if (Comparing.equal(newFilterThread, oldFilterThread)) {
      // the filter already added
      return;
    }
    requestManager.setFilterThread(newFilterThread);
    if (newFilterThread == null || oldFilterThread != null) {
      final List<Breakpoint> breakpoints = getBreakpoints();
      for (Breakpoint breakpoint : breakpoints) {
        if (LineBreakpoint.CATEGORY.equals(breakpoint.getCategory())
            || MethodBreakpoint.CATEGORY.equals(breakpoint.getCategory())) {
          requestManager.deleteRequest(breakpoint);
          breakpoint.createRequest(debugProcess);
        }
      }
    } else {
      // important! need to add filter to _existing_ requests, otherwise Requestor->Request mapping
      // will be lost
      // and debugger trees will not be restored to original state
      abstract class FilterSetter<T extends EventRequest> {
        void applyFilter(@NotNull final List<T> requests, final ThreadReference thread) {
          for (T request : requests) {
            try {
              final boolean wasEnabled = request.isEnabled();
              if (wasEnabled) {
                request.disable();
              }
              addFilter(request, thread);
              if (wasEnabled) {
                request.enable();
              }
            } catch (InternalException e) {
              LOG.info(e);
            }
          }
        }

        protected abstract void addFilter(final T request, final ThreadReference thread);
      }

      final EventRequestManager eventRequestManager = requestManager.getVMRequestManager();

      new FilterSetter<BreakpointRequest>() {
        @Override
        protected void addFilter(
            @NotNull final BreakpointRequest request, final ThreadReference thread) {
          request.addThreadFilter(thread);
        }
      }.applyFilter(eventRequestManager.breakpointRequests(), newFilterThread);

      new FilterSetter<MethodEntryRequest>() {
        @Override
        protected void addFilter(
            @NotNull final MethodEntryRequest request, final ThreadReference thread) {
          request.addThreadFilter(thread);
        }
      }.applyFilter(eventRequestManager.methodEntryRequests(), newFilterThread);

      new FilterSetter<MethodExitRequest>() {
        @Override
        protected void addFilter(
            @NotNull final MethodExitRequest request, final ThreadReference thread) {
          request.addThreadFilter(thread);
        }
      }.applyFilter(eventRequestManager.methodExitRequests(), newFilterThread);
    }
  }